Analysis

  • max time kernel
    144s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-10-2022 02:19

General

  • Target

    f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe

  • Size

    787KB

  • MD5

    925d49af178b98a12118f93c8a82422d

  • SHA1

    cbeff9068bfe1f440053f42484af914962e58c40

  • SHA256

    f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454

  • SHA512

    35f825b52d152ab6150f65fd1adabf4827726dceb0d97151d5f68ca4e326878ecdc5f207cf1fbcc423d10e624f7028b1e02f6bc5a28062363d80c2f8a5eb3c73

  • SSDEEP

    12288:dWQ7LPHacEFnn59GS89x+0Yko2oJXWwRx0wYQkYRgKIq280A59twDUHRunnZNdKW:dF7BKn22Lklz6x9ZhqAxw4H6pK

Malware Config

Extracted

Family

djvu

C2

http://winnlinne.com/lancer/get.php

Attributes
  • extension

    .towz

  • offline_id

    SSHsHMHGmSIhrz50VnIxLJJX15osxEQY6iXedXt1

  • payload_url

    http://rgyui.top/dl/build2.exe

    http://winnlinne.com/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-Kbx8mJatqN Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0577Jhyjd

rsa_pubkey.plain

Extracted

Family

vidar

Version

54.9

Botnet

517

C2

https://t.me/larsenup

https://ioc.exchange/@zebra54

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 10 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe
    "C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4568
    • C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe
      "C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1488
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b67bd797-3e7d-44fe-9d0e-30155d687c5a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3984
      • C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe
        "C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4952
        • C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe
          "C:\Users\Admin\AppData\Local\Temp\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1112
          • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build2.exe
            "C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3376
            • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build2.exe
              "C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:812
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 764
                7⤵
                • Program crash
                PID:2340
          • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build3.exe
            "C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:3432
            • C:\Windows\SysWOW64\schtasks.exe
              /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
              6⤵
              • Creates scheduled task(s)
              PID:3492
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3544
    • C:\Windows\SysWOW64\schtasks.exe
      /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2720
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 812 -ip 812
    1⤵
      PID:4748

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\mozglue.dll

      Filesize

      593KB

      MD5

      c8fd9be83bc728cc04beffafc2907fe9

      SHA1

      95ab9f701e0024cedfbd312bcfe4e726744c4f2e

      SHA256

      ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

      SHA512

      fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

    • C:\ProgramData\nss3.dll

      Filesize

      2.0MB

      MD5

      1cc453cdf74f31e4d913ff9c10acdde2

      SHA1

      6e85eae544d6e965f15fa5c39700fa7202f3aafe

      SHA256

      ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

      SHA512

      dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

      Filesize

      2KB

      MD5

      dbd2ef00711b9e8a65a71435dac362a2

      SHA1

      befb6f2c27daebeef7bcd7ed80c9dc50241bf5b6

      SHA256

      5affc8e9407564299e0b7ce1953b921d33dab949c296198ce30781c952e6a047

      SHA512

      500c02a21467c0f04337258c07a1e5f71da3dbbe2105e8e63881fe064bd4ebac7db8347e5a8e554b384237961e3df35513ff14bdc4a409862ac1eca5c35bf378

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

      Filesize

      1KB

      MD5

      4b17013381328e3e6c6496e128289829

      SHA1

      77e65de2b337899996a68241226fd97196d9a73d

      SHA256

      c7cd9f2c74cb78237c3ed4e8f1a42ddc1c03c0f64a0ca70aad4a4af1f7182f71

      SHA512

      3fed91eec2c1c6de1f646b8664859691e15a3f04f17df41033616d609ab166309bd821a1190146535c3976c00b687ea1ab6fe4aa1d235b516bf6a79a29887763

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

      Filesize

      488B

      MD5

      88b340616095cc191b28ac567e55295b

      SHA1

      1bfa73574f7c46fb62900bf432c60e2b27d84431

      SHA256

      5d119c3df9f8aa862b61367559b6fc909029cfc92e4a848836bf02f7672dd16c

      SHA512

      1f990ad71c02b3b28a54460f0fe9e49da157f519431e08cc740fb71921148cf9c8b78846310bedb38bb6c9bf9b54d413ea6e6800d922a66fcb8b6d2a86bcbd02

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

      Filesize

      482B

      MD5

      1baffd2d8c56b6e05bb28289d5436c76

      SHA1

      45be008ebaa39a95cf722723d272853765015db4

      SHA256

      42d0cce780f69b75463c3ee6edef3d0358b17a40ed24e5ad744e7eff671ab4c4

      SHA512

      90c609937f41bda485e0a59ede9f7be65d375dafaad719cff61869b9b4b2e0e6bf77d0e47eb71a7986dff93aeb4968a8e4998b0f44f4ff82988065fec9e44e6f

    • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build2.exe

      Filesize

      255KB

      MD5

      9c3d4324a153c6438f48083bc333a962

      SHA1

      033e80e2008f4f62d2716ce0473bb0d763d52277

      SHA256

      5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

      SHA512

      8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

    • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build2.exe

      Filesize

      255KB

      MD5

      9c3d4324a153c6438f48083bc333a962

      SHA1

      033e80e2008f4f62d2716ce0473bb0d763d52277

      SHA256

      5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

      SHA512

      8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

    • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build2.exe

      Filesize

      255KB

      MD5

      9c3d4324a153c6438f48083bc333a962

      SHA1

      033e80e2008f4f62d2716ce0473bb0d763d52277

      SHA256

      5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

      SHA512

      8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

    • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Local\5d39f5cc-4298-4348-8090-770fe6eea198\build3.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Local\b67bd797-3e7d-44fe-9d0e-30155d687c5a\f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454.exe

      Filesize

      787KB

      MD5

      925d49af178b98a12118f93c8a82422d

      SHA1

      cbeff9068bfe1f440053f42484af914962e58c40

      SHA256

      f8af21d2aa037b9dcab2bd0ca7fe4321aaef3119b23bf0f1eec7abf115fcf454

      SHA512

      35f825b52d152ab6150f65fd1adabf4827726dceb0d97151d5f68ca4e326878ecdc5f207cf1fbcc423d10e624f7028b1e02f6bc5a28062363d80c2f8a5eb3c73

    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

      Filesize

      9KB

      MD5

      9ead10c08e72ae41921191f8db39bc16

      SHA1

      abe3bce01cd34afc88e2c838173f8c2bd0090ae1

      SHA256

      8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

      SHA512

      aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

    • memory/812-193-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/812-163-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/812-189-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/812-162-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/812-168-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/812-157-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1112-147-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1112-145-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1112-152-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1112-188-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1488-136-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1488-135-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1488-137-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1488-138-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1488-142-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3376-161-0x0000000000720000-0x000000000076A000-memory.dmp

      Filesize

      296KB

    • memory/3376-159-0x00000000007ED000-0x0000000000818000-memory.dmp

      Filesize

      172KB

    • memory/4568-132-0x00000000021E9000-0x000000000227A000-memory.dmp

      Filesize

      580KB

    • memory/4568-133-0x0000000002280000-0x000000000239B000-memory.dmp

      Filesize

      1.1MB

    • memory/4952-146-0x000000000217F000-0x0000000002210000-memory.dmp

      Filesize

      580KB